For comparatively smaller single-phase load, the duplicate supply single-phase transfer switch made of miniature contactors can be selected.
对较小的单相负荷可采用由微型接触器构成的双电源单相切换开关。
In this connection, the override is analyzed in terms of protection principles. Suggestions on protection coordination of short line with duplicate supply are put forth as well.
针对这种情况，从保护原理上对其超越情况进行分析，并对距离保护在双侧电源短线路的保护配合提出看法。
Also be sure that the company you hire will supply documentation allowing you to retrace their steps if necessary to solve a problem or duplicate their work at a later date.
还要让你雇佣的公司提供技术文档，以备日后解决问题时参考或重复他们的工作。
Also be sure that the company you hire will supply documentation allowing you to retrace their steps if necessary to solve a problem or duplicate their work at a later date.
还要让你雇佣的公司提供技术文档，以备日后解决问题时参考或重复他们的工作。
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